For those on DSM2 transmitters like the DX6i/DX7/DX5e:

Preset Failsafe
The AR6255 features preset failsafe on all channels. Preset failsafe is ideal for
sailplanes, allowing the aircraft to automatically dethermalize if the signal is lost. With
preset failsafe, all channels will go to their preset failsafe positions if the signal is
lost, preventing a flyaway.
The Receiver is $80 USD, but a wortwhile alternative to the BR6000.